Belt dressing



Patented Sept. 19, 1922.

warren states 1.

PEARL E. ULLRICI-I, OF CHICAGO, ILLINOIS.

BELT DRESSING.

No Drawing.

T 0 all whom c'tmay concern Be it known that I, PEARL E. ULLRICH, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and usefulImprovement in Belt Dressings, of which the following is a full, clear,concise, and exact description.

My invention relates to belt dressings.

In providing a suitable compound forconditioning and preserving leatherdriving belts, it is essential to provide a contituent which will keepthe belt soft and pliable and preserve the same against deterioration,and at the same time to provide a surfacing compound which will increasethe grip or friction between the pulley and the belt.

I have discovered that base oil in condensed formis suitable for use asa belt dressing, as it contains the necessary properties for preservingthe leather of the belt, and also providing a satisfactory surfacing tomaintain the grip of the belt upon the pulley.

In the manufacture of water gas an incandescent body of coal is treatedwith steam to form what is known as dry gas. The gas is then enriched orcarburetted by cracking a petroleum oil known as gas oil, which is apetroleum distillate of a boiling point of from about 500 F. to 700 F.

About 65% of this oil by weight is transformed into a fixed gas, andabout 20% forms a residue of an oil tar, some carbon being formed.

The gas is then cooled and scrubbed, and at this stage certain grades ofoil known as wash oils are extracted from the gas.

The heavier of these wash oils are extracted first. Thereafter, what isknown as light oils are extracted. The heavier and lighter grades mayall be run off together.

About 10% of the wash oils have boiling points at or below 200 0.,beginning with benzine at about 81 0., toluene at about 110 0., xylenesat about 140 0., cymenes at about 170 0., and still others at higherpoints and with numerous grades between these points. The xylenes andcymenes are known as solvent oils.

My invention employee the residue of the light oils after the aromaticoils, or solvents, have been fractioned off. This residue is known asbase oil and forms the source of material for my improved belt dressing.

The base oil as it comes from the still or Application filed. October30, 1920. Serial No. 420,793.

This raw base oil is too thin to besuitable for my purpose, and Itherefore thicken or condense the same by heating over an open flame 1nthe presence of air. In the manufacture which I have thus far conducted,I

have heated the base oil at this stage to the boiling point in thepresence of the oxygen of the atmosphere, and I have agitated the massby stirring. .I consider that the agitation could be accompanied byblowing of air through the base oil. I consider that the heating hasresulted, first of all, in driving off some of the lighter oils, andsecond perhaps in polymerization of some of the mass to thicken thesame, and third, the oxygen of the air appears to promote the viscosityof the oil.

I propose to manufacture the composition on a larger scale than atpresent by heating the oil with steam coils and blowing air and steamtherethrough, both to secure agitation and to bring the oxygen of theair in contact with the hot base oil.

The resultant material is a thick liquid mass of specific gravitysubstantially 1.018

at 152; 0., and a viscosity of substantially 10.9 at a temperature of140 0., as compared with water at 20 0., as measured by the Sayboletviscosometer.

I consider that the mass contains a certain amount of oil, with otherconstituents, the nature of which 1 am unable to-explain, and which Ibeg leave to describe more in detail as soon as I become aware of thetrue character thereof. The thinner oils serve to keep the belt flexibleand well preserved, and

the other constituents serve to impart a surfacing which grips thepulley. The belt dressing of my invention is of a substantially fixedcharacter, as it does not deteriorate with age, nor does 'it tend toevaporate when exposed to the atmosphere. It is free from any injuriousconstituents which would attack the leather of the belt, and at the sametime it provides an adhesive surface which is capable of imparting thenecessary gripping qualities to the leather.

After thickening or condensing the base oil in the manner aboveindicated, I preferably provide a masking odorant for overcoming thesmell of gas which is given off by this material. For this purpose oilof citronella, oil of sassa fras or any suitable o-dorant of arelatively powerful character may be applied. This odorant has no effectso far as the conditioning and preserving oi the belt is concerned; itis merely to make the product more salable.

The resulting material is packed in tins or the like and is applied tothe belt in the well known manner.

I do not intend to be limited to the precise steps of procedure or theprecise characteristics above described.

I claim:

1. A belt dressing consisting of concentrated base oil.

2. A belt dressing consisting of base oil of a specific gravity ofsubstantially 1.018 at 151 C.

3. A belt dressing consisting of the residue of wash oil from gasplants, after the aromatic, or solvent hydrocarbons have been distilled.

. 4. The method of treating baseoil t0 render the same suitable for beltdressing, which consists in heating the base oil to the boiling pointuntil it assumes a specific gravity of substantially 1.018 at 152 C.

5. A belt dressing consisting of condensed base oil of a viscosity ofsubstantially 10.9 at a temperature of 140 (3., as compared with waterat C.

6. A belt dressing consisting of a concen trated and aerated residue ofWash oils from gas plants.

7. A belt dressing consisting of concentrated and oxidized residue ofwash oils from gas plants.

In witness whereof, I hereunto subscribe my name this 28th day ofOctober, 1920.

PEARL E. ULLRICH.

